<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="../vue.js"></script>
</head>

<body>
    <div id="app">
        <div>
            <h1>计数器{{count}}</h1>
            <button v-on:click = 'count=count+1'>累加1</button>
            <button v-on:click = 'add'>累减</button>
        </div>
    </div>

    <script>
        const vm = new Vue({
            el: '#app',
            data() {
                return {
                    count: 0
                }
            },
            methods:{
                add(){
                    this.count--
                }
            }
        })
    </script>
</body>

</html>